Posted by **Connie** on Saturday, September 10, 2011 at 4:49pm.

Posted by Connie on Saturday, September 10, 2011 at 10:36am.

What is the amount of energy of calories to heat 8.5g of water from 15 C to 36 C?

I think you take 8.5g x 21 degree C, but then I am stuck. Thank you

Chem - Jai, Saturday, September 10, 2011 at 10:50am

amount of energy absorbed or released is given by

Q = mc*(T2 - T1)

where

Q = heat (in Joules)

m = mass (in grams)

c = specific heat capacity (J/g-K)

T = temperature (in Celsius or Kelvin)

*note that Q is (+) if the object absorbed heat, and (-) if it released heat.

for water, c = 4.184 J/g-K (you can find this in books or you can google this)

substituting,

Q = 8.5*4.184*(36-15)

Q = ?

now solve for Q. units in Joules.

hope this helps~ :)

First, thank you, I get 746.844J but my book says the answer is 180 cal---what am I not doing correctly?

## Answer this Question

## Related Questions

- Chem - What is the amount of energy of calories to heat 8.5g of water from 15 C ...
- Physics-Please check-I've attempted it - Posted by Matt W on Tuesday, January 4...
- chem - How much heat(energy) in calories will it take to warm 25 g of ice at -10...
- Mucic - which skill helps a musician sing or play exercises or musical passages ...
- Chemistry - How much energy(in calories)would it take to heat 13g of water 2 ...
- PHYSICS - In lab, Will burns a 0.6- peanut beneath 48 of water, which increases ...
- Physics - My question is two parts How many calories of heat energy would it ...
- chemistry - using the values for heat of fusion, specific heat of water, or heat...
- physics - The specific heat of mercury is .03cal/g*C, and it's boiling point is ...
- CHEM - You have a bottle of water. The water has a mass of 29 grams. You heat ...

More Related Questions